Alton



W. ALTON March 6, 1962 APPARATUS FOR TESTING AGILITY AND POWERS OFC0-ORDINATION Filed June 27. 1958 2 Sheets-Sheet 1 Elie March 6, 1962 w.ALTON 3,024,020

APPARATUS FOR TESTING AGILITY AND POWERS OF CO-ORDINATION Filed June 27,1958 2 Sheets-Sheet 2 United States Patent C) 3,024,020 APPARATUS FORTESTING AGILITY AND POWERS F CO-ORDINATION Werner Alton, White Hills,Northampton, England, assignor to John Douglas Calder, Coventry. EnglandFiled June 27, 1958. Ser. No. 745,047 Claims priority, application GreatBritain Aug. 3, 1957 7 Claims. (Cl. 272-57) The invention relates toapparatus for testing agility and powers of co-ordination, and has forits object to test or improve the pedal or manual agiliy of a user, orhis powers of co-ordinating pedal and/or manual movements, forproviding, for example, remedial exercises or a means for athletictraining.

The improvement or modification according to the present inventioninvolves effecting the selection of the steps of an exercise to beperformed by the insertion of a punched card of insulating materialbetween two planar banks of conductive bars, the bars of each b nk beingpara lel to each other and at right angles to the bars of the otherbank, the bars of one bank being included in respective circuits wh cheach contain an indicator and a normally-closed switch adapted to beoperated to an open-circuit condition by an actuation of an associatedmovable member, the bars of the other bank being for selectiveconnection in a circuit under the control of a selector mechanism, andthe bars of the respective banks being adapted to contact each o her,where they cross, through holes of the punched card so as to beelectrically interconnected, whereby the selected bar of said other bankwill energise at least one indicator through a corresponding hole of thecard until the associated movable member is actuated to open itsnormallyclosed switch to de-energise the said indicator.

According to a further feature the selector mechanism is of a kind whichis driven automatically to select the bars of the said other bank in tmed sequence. In such a ca-e means can be provided for varying the speedof operation of the selector mechanism whereby to enable the time factorof the timed sequence to be adjusted.

According to a still further feature optionally-operable means areprovided for actuating the selector mechanism to its zero position.

While according to yet another feature the said other bank isduplicated, each duplicate set of bars being associated withsynchronised selector mechanisms and serving half the bars of the saidone bank, and the duplicate sets being relatively laterally displacedfor the bars of each set to coact with separate series of holes in thepunched card for effecting electrical interconnection with the bars ofthe said one bank.

One embodiment of the present invention is diagrammatically illustratedin the accompanying drawings, in which:

FIGURE 1 is a diagrammatic perspective view of the apparatus, showing aplatform on which an exercise is to be performed, an associatedindicator board, and a selector box;

FIGURE 2 is a circuit diagram presented in the detached manner commonlyaccepted in telephony practice (i.e., the various components are shownin such positions as will permit the clearest arrangement of the variouscircuits);

FIGURE 3 is a fragmentary view illustrating the disposition of one ofthe micro-switches in a compartment of the platform; and

FIGURE 4 is an exploded fragmentary view showing the coaction of aselector card with selector bars.

The object of the apparatus is to enable foot and leg exercises to beperformed in certain predetermined sequences, for which purpose atrainee has to place his feet on successive pairs of the numbered areasof the platform in order to extinguish electric lamps in thecorresponding areas of the indicator board. As each pair of lamps isextinguished a fresh pair lights up, and so on until the end of theexercise.

It is arranged for the pairs of lamps to be illuminated in apredetermined sequence by the use of an insulating card punched withholes which enable resilient contacts electrically to interconnectselected bars, which are parallel with each other, of one set with barsof a second set at right angles, these later bars being in respectivecircuits wh ch e ch contain one of the lamps. For extinguishing thelatter it is necessary for the trainee to place one of his feet on thecorresponding area of the platform to depress it and there y to open anormallyclosed switch in the associated lamp circuit.

The selection of the pairs of lamps to be illuminated is made by arotary selector mechanism and means are pro ided for this selectormechan'sm to be actuated for selecting a p ir of lamps to be lit, by theaction of the trainee in extinguishing a previous pair, or by a trainer,or automatically in a timed sequence; and in this lastmentioned casemeans are provided for varying the timing of the selecton to suit thetrainee, and for terminat n n exercise before it has been finished.

FIGURE 1 shows the platform at 20, the ind cator board at 21 and theselector box at 22. The platform has a top covering 23 of sheet rubberarranged above twelve compartments, and the areas of the covering abovethese compartments are marked 1 to 12, although other symbols could beused. Each compartment contains a normally-closed micr -switch, andthese switches are marked F1 to F12 in FIGURE 2 lthough for the sake ofclearness switches F4 to F7, inclusive. are not shown). It will be seenfrom FIGURE 3 that a rigid member 24 is secured to the underside of thecovering 23 above each compartment and serves to operate the associatedmicro-switch.

The indicator board has twelve lamps which are arranged, in compartmentsbehind a trans ucent front 21a, in the same relative positions as theareas of the platform and these lamps are designated L1 to L12 in FIG-URE 2, each lamp being series connected with the microswitch having thesame suflix number (i.e., lamp L3 with switch F3). In the centre of theindicator board is an additional lamp LF13 which is preferably behind ared translucency and the purpose of which will be described later.

Contained within the selector box are a relay P which operates threenormally open contacts p1, p2 and p3; a relay R which operates a pair ofmechanically-interconnected, change-over contacts r /z; a relay L whichoperates two normally-closed contacts 11 and I2; and a relay H whichoperates a normally closed contact hl and three normally open contactsh2, I13 and I14. Beneath the letter indicating each of these relays isindicated, in accordance with telephone practice, the number of thecontacts it operates. Also contained within the selector box is atelephone-type, four-bank self-cycling rotary selector S with a reversedrive (i.e., it operates under spring bias when the circuit of anassociated electro-magnet MS, also within the selector box, is opened),the four wiper arms of which are marked S1, S2, S3 and S4 in FIGURE 2and coact with separate series of twenty-five contacts in the respectivebanks as hereinafter described. To indicate this in accordance withtelephone practice the figures 4 x 25 are shown beneath the legend M inFIGURE 2.

The selector box has a hinged lid to the inner surface of which issecured, in an insulated manner, a plurality of parallel selector barsB. These bars are series connected respectively with the seriesconnected micro- 3 switches and lamps, and they are marked in FIGURE 2with corresponding sufiixes.

On the top of the selector box, under the lid, are two series ofparallel cross-bars which are insulated from each other. The cross-barsof one of these series are designated CA, and those of the other CB, theCA bars being laterally oil-set with respect to the CB bars. The numberof cross-bars in the two series is the same, and that number limits thetotal number of steps of which an exercise can be composed. In thepresent instance it is assumed that the maximum number of such steps istwenty-four, and the cross-bars bear their step numbers as suflixes. Forclearness of illustration cross-bars CA5 to CA23, and CBS to CB23 havebeen omitted from FIGURE 2. The CA cross-bars are respectively connectedto the selector contacts associated with wiper arm S1, and the CBcross-bars with those associated with wiper arm S2.

The selector bars B are normally adapted to effect electrical contactwith the cross-bars CA and CB where they cross them (e.g., there can bespring-pressed contact balls at the cross-over points) but only inselected positions are these contacts permitted to occur. This selectionof positions is effected by a card 25 of insulating material which ispunched with holes in selected positions. It is arranged that the holesare so disposed in the card that each CA bar makes contact with only oneB bar, and that each CB bar makes contact with only one B bar, thearrangement being such that each pair of CA and CB bars (e.g., CA2 andCB2) select two lamps.

Mounted on or within the selector box is a starting, press-button switchhaving a normally-open contact SB1 and a normally-closed contact 582; aswitch PR for enabling an exercise automatically to be repeated; aswitch PH which is to be operated manually when it is desired to stopautomatic action of the apparatus when, for example, the trainee provesto be too slow to keep pace with an exercise which is arranged to hesequenced automatically; and a switch KH which is to be used for homingthe selector wipers before the start of an exercise. There is also aswitch having three normally-open contacts KAI, KA2 and KA3. All ofthese switches but KH are of a kind to remain in a position to whichthey have been operated until operated to the reverse position.

In addition to these components, the selector box contains a fixednon-inductive resistance 26 connected in shunt across relay P; acondenser 27 and a variable noninductive resistance 28 associated withrelay R and switch contact KA3; and self-interrupter contact 29associated with electro-magnet MS and a condenser 36.

The apparatus is fed from mains 31, 32, through a transformer 33 whichis connected across a rectifying bridge 34 of which the intermediatebridge points are connected to the positive and negative lines of theapparatus. A lead 35, with multi-pin plugs at its ends effects theconnections between the micro-switches of the platform and the bars B inthe selector box, and a further lead 36 with multi-pin plugs effects theconnections with the lamps of the indicator board.

The purposes of these switches, and the other components, together withtheir interrelationship will be apparent from the following descriptionsof the several functions of the apparatus.

Re-setting the selector to zer0.-lf before, or on insertion of theperforated card, any of bars B1 to B12 should have been permitted tomake electrical contact with any of the cross-bars CA or CB, theselector may have stepped off the zero position and must be re-set by ashort operation of the switch KH. Closing this switch establishes acircuit from the negative line 37, through electromagnet MS,self-interrupter 29, wiper arm S4 (which will be off zero), and switchKH to the positive line 38. The effect of this is to cause the magnet MSto become energised, and then de-energised by self-interrupter 29,

repeatedly until all of the wipers S1, S2, S3 and S4 reach their zerocontacts. In those conditions wiper S4 opens the circuit of theelectro-magnet MS, lamps L10 and L11 light up and the apparatus is thenready for the commencement of an exercise dictated by the positioning ofthe holes in a pre-selected perforated card previously placed inposition between bars B and cross-bars CA and CB. It is arranged foreach exercise to commence with lights L11 and L12 illuminated as thismeans that the trainee must commence with his feet side by side on theareas 11 and 12 of the platform. The circuit of lamp L11 is from thenegative line 37, through relay coil L and the lamp, throughnormaly-closed micro-switch F11 and a line 39, which by-passes bar B11,to the zero contact 40 of the wiper arm S1, thence through the wiper armitself and to the positive line 41. The circuit of lamp L12 is from thenegative line 37, through relay coil L, the lamp, normally-closedmicro-switch F12, a line 42 which by-passes bar B12, and to the zerocontact 43 of wiper arm S2, thence through the wiper arm itself and topositive line 44.

Standard exercise controlled by the agility of the trainee-When thetrainee correctly steps on to areas 11 and 3.2 of the platform,normally-closed micro-switches F11 and F12 are operated to their openpositions and the circuits of lamps L11 and L12, and of relay L, areopened. An instructor can now start the exercise, dictated by the card,by shortly depressing the starting button $131 to energise relay P. Thisis effected by a circuit from negative line 37, the coil of relay P,contacts r /2, normally-closed relay contacts k1, switch contact S131,the zero contact of wiper S3, and normally-closed relay contact L1 topositive line 45. This energising of relay P closes normally-opencontact p2 and establishes a circuit from negative line 37, through thecoil of electromagnet MS, and normally-closed contact 12, to positiveline 46. The energising of relay P also closes contact p1 and energisesrelay R by a circuit from negative line 37, the coil of relay R,contacts p1 and hl, contact SBl, the zero contact of wiper arm S3, andcontact 11 to positive line 45.

This energisation of relay R changes over the position of contacts 1- /2and opens the circuit of relay P which causes contact p2 to open thecircuit of the electromagnet MS, whereafter all four selector wipers S1,S2, S3 and S4 are advanced one step by their biassing means. This, inthe example given, causes lamps L3 and L9 to light up and relay L to bere-operated as follows: A circuit is established from negative line 37,through the coil of relay L, lamp L3, normally-closed micro-switch F3,bar B3, cross-bar CA1, and wiper arm S1 to positive line 41, and anothercircuit is completed from negative line 37, lamp L9, normally-closedmicro-switch F9, bar B9, cross-bar CB1, and wiper arm S2 to positiveline 44. Meanwhile, as relay P has been de-energised, contact 111 opensto de-energise relay R.

When the trainee now steps on to areas 3 and 9, the lamps and relay Lwill be open-circuited by micro-switches F3 and F9, and this immediatelystarts another cycle of the relay P/relay R combination andelectro-magnet MS operation, only now through wiper arm S3, which willhave been moved off its zero contact, instead of through starter buttoncontact 8131. This will cause two other lamps to light up in accordancewith the perforations in the card, and relay L again operates, and so onuntil the selector wipers again reach their zero contacts (the selectorcontacts being arranged in respective circles), where relay P cannotfunction unless the starter button contact SB1 is closed.

Two versions of this kind of exercise are provided for as follows:

One version is in the form of a short exercise consisting, say, of onlytwelve steps. The exercise will consist in the use of only half of theperforation positions in the card when the latter is designed for atwenty-four step exercise. The card will have a series of holes, for thelast twelve steps (not to be used in the exercise), which are displacedlaterally with respect to the operative holes for the first twelvesteps, and these laterally displaced holes are for coaction with anadditional selector bar BH which is connected through line 47 with thecon tacts for wiper S4. The additional holes in the card connect bar BHto cross bars C313 to C1324, and this makes the wiper arms S1, S2, S3and S4 home through the last twelve steps. The circuit for effectingthis is from negative line 37, electro-magnet MS, self-interrupter 25,line 47, bar BH, cross bars CB13 to CB24, and wiper arm S2 to positiveline 44.

The second version provides an automatic repetition of the completeexercise provided by the card. This is effected by operating switch PRto its closed condition, and this by-passes the start button contact8131 and immediately re-starts the relay P/relay R combination cyclewhen the wiper arms S1, S2, S3 and S4 reach their zero contacts at theend of the first performance of the exercise prescribed by the card.

Timed prgress.1n this case the progress of the exercise is notcontrolled by the working of the trainee, no matter how slow this maybe, but is imposed on him by the P/R relay combination which is made tobe selfcycling. For this purpose the contacts KAl, KA2, KA3 and PH areoperated to their closed conditions and the operation is as follows:

A short operation of starter button SBl energises relay P through acircuit extending from negative line 37, the coil of relay P, contact r/2, contact 121, starter button contact SE1, the zero contact of wiperarm S3 and contact 11 to positive line 45. Contact 172 operates theselector wiper arms S1, S2, S3 and S4 through a circuit extending fromnegative line 37, electro-magnet MS, contact 12, and contact p2 topositive line 46. Thus, relay P causes relay R to be energised throughcontact p1, the circuit being from negative line 37, the coil of relayR, contact pl, contact hl, starter button contact SBl, the Zero contactof wiper arm S3 and contact 11 to positive line 45. The release of relayR, however, is delayed by condenser 27, which is connected in parallelwith its coil, through switch KA3, and by variable noninductiveresistance 28 in series with a fixed resistor 48. The resistor 28 limitsthe charge of the condenser 27 and so controls the delayed release ofrelay R, and therefore the cycling time of the P/R relay combination. Aslong as the foot-work of the trainee keeps inside the rhythm given bythe automatic cycle of the P/R relay combination, the selector wiperarms S1, S2, S3 and S4 will continue to step, but if the trainee is tooslow and relay L is still energised when relay R becomes de-energisedand relay P becomes energised, relay H will be energised. The relevantcircuit is from negative line 37, the coil of relay H, contact p3,switch KAZ and contact 11 to positive line 45. In these conditions relayH will hold itself in circuit after relay P has become de-energised, andthis is effected by a circuit from negative line 37, relay H, contacth2, starter button contact 5B2, switch PH, switch contact KA2 andcontact 11 to positive line 45. While this condition prevailselectro-magnet MS is prevented from operating by contact 12, and contacthl stops operation of the P/R combination. A signal lamp LF13 in thecentre of the indicator board is illuminated through contact h3 to showthe trainee that has has failed to keep pace with the rhythm of theexercise. Lamp LF13 will continue to be illuminated until the traineeeventually steps on to the correct squares of the platform, whereafter,by the consequent release of relays L and H, the automatic cycling ofthe relay P/relay R combination is restored. By closing a push/pullswitch PB an electric bell LBl3 can be energised through contact 113when lamp LF13 lights up.

Three versions of this exercise are provided for.

One of these is a shortened version of the exercise pre- 6 scribed bythe card, and this is effected in the way above described for thestandard exercise. The second version involves the automatic repetitionof the timed exercise, and this is effected as previously described inrelation to the standard exercise. The third version involves theinterruption of the timed exercise when the trainee lags behind. If theswitch PH is left in its normal close position, relay H will hold itscircuit independently of contacts 11 and p3, this holding circuit beingfrom negative line 37, the coil of relay H, contact h2, starter buttoncontact SE2 and switch PH to positive line 49. Thus, the cycle of theP/R relay combination will be stopped until relay H is released bystarter button contact SB2 (i.e., by pressing the starter button).

It is desirable when a perforated card is inserted between the selectorbars and cross-bars to make sure that it is properly positioned with itsperforations at the crossing points of the selector bars and cross-bars.For this purpose a push/pull switch PC is arranged to energise relay Pthrough contacts 1- /2 indepedently of the contact I11 and wiper arm S3circuit when the apparatus is set for automatic action. In theseconditions the P/R relay combination will pulse until switch PC issubsequently opened after it has been checked that all of the lights ofthe selection dictated by the perforations of the card have lighted upin their predetermined sequence. If some of them do not, indicating thatthe card is not accurately positioned, the card is adjusted until, on arepetition of p the test, they do. The speed of the test can be variedby adjusting the variable non-inductive resistance 28 so as to controlthe pulsing time of the P/R relay combination.

What I claim as my invention and desire to secure by Letters Patent ofthe United States is:

1. Apparatus for testing agility and powers of coordination, comprisingtwo planar banks of conductive bars, the bars of each bank beingparallel to each other and the bars of one of said banks being atright-angles to the bars of the other bank, respective circuits eachincluding a respective one of the bars of said one bank, a respectiveindicator in each said circuit, a respective normally-closed switch ineach said circuit, a respective movable member adapted to be operated bya user of the apparatus to operatea said normally-closed switch to itsopen condition, a selector mechanism, said selector mechanism adaptedselectively to connect the bars of said other bank in a second circuit,means adapted to drive said selector mechanism to select said bars ofsaid other bank for connection in said second circuit in timed sequence,an insulating card to be inserted between said banks, said insulatingcard provided with holes in predetermined positions where the bars ofboth said banks cross each other, the bars of both said banks beingelectrically interconnected by contact with each other through saidholes whereby the selector bar of said other bank will energise theindicator in the circuit of each bar of said one bank it contacts untilthe associated movable member is actuated to open the associatednormally-close switch to de-energise the said indicator.

2. Apparatus for testing agility and powers of coordination, comprisingtwo planar banks of conductive bars, the bars of each bank beingparallel to each other and the bars of one of said banks being atright-angles to the bars of the other bank, respective circuits eachincluding a respective one of the bars of said one bank, a respectiveindicator in each said circuit, a respective normally-closed switch ineach said circuit, a respective movable member adapted to be operated bya user of the apparatus to operate a said normally-closed switch to itsopen condition, a selector mechanism, said selector mechanism adaptedselectively to connect the bars of said other bank in a second circuit,means adapted to drive said selector mechanism to select said bars ofsaid other bank for connection in said second circuit in timed sequence,

means adapted to vary the speed of operation of said selector mechanismwhereby to enable the time factor of the timed sequence to be adjusted,an insulating card to be inserted between said banks, said insulatingcard provided with holes in predetermined positions where the bars ofboth said banks cross each other, the bars of both said banks beingelectrically interconnected by contact with each other through saidholes whereby the selected bar of said other bank will energise theindicator in the circuit of each bar of said one bank it contacts untilthe associated movable member is actuated to open the associatednormally-closed switch to de-cnergise the said indicator.

3. Apparatus for testing agility and powers of coordination, comprisingtwo planar banks of conductive bars, the bars of each bank beingparallel to each other and the bars of one of said banks being atright-angles to the bars of the other bank, respective circuits eachincluding a respective one of the bars of said one bank, a respectiveindicator in each said circuit, a respective normally-closed switch ineach said circuit, a respective movable member adapted to be operated bya user of the apparatus to operate a said normally-closed switch to itsopen condition, a selector mechanism, said selector mechanism adaptedselectively to connect the bars of said other bank in a second circuit,means adapted to drive said selector mechanism to select said bars ofsaid other bank for connection in said second circuit in timed sequence,optionally-operable means for actuating said selector mechanism to itszero position, an insulating card to be inserted between said banks,said insulating card provided with holes in predetermined positionswhere the bars of both said banks cross each other, the bars of bothsaid banks being electrically interconnected by contact with each otherthrough said holes whereby the selected bar of said other bank willenergise the indicator in the circuit of each bar of said one bank itcontacts until the associated movable member is actuated to open theassociated normally-closed switch to de-energise the said indicator.

4. Apparatus for testing agility and powers of coordination, comprisingtwo planar banks of conductive bars, the bars of each bank beingparallel to each other and the bars of one of said banks being atright-angles to the bars of the other bank, respective circuits eachincluding a respective one of the bars of said one bank, a respectiveindicator in each said circuit, a respective normally-closed switch ineach said circuit, a respective movable member adapted to be operated bya user of the apparatus to operate a said normally-closed switch to itsopen condition, a selector mechanism, said selector mechanism adaptedselectively to connect the bars of said other bank in a second circuit,means adapted to drive said selector mechanism to select said bars ofsaid other bank for connection in said second circuit in timed sequence,means adapted to vary the speed of operation of said selector mechanismwhereby to enable the time factor of the timed sequence to be adjusted,optionallyoperable means for actuating said selector mechanism to itszero position, an insulating card to be inserted between said banks,said insulating card provided with holes in predetermined positionswhere the bars of both said banks cross each other, the bars of bothsaid banks being electrically interconnected by contact wtih each otherthrough said holes whereby the selector bar of said other bank willenergise the indicator in the circuit of each bar of said one bank itcontacts until the associated movable member is actuated to open theassociated normallyclosed switch to de-energise the said indicator.

5. Apparatus for testing agility and powers of coordination, comprisingtwo planar banks of conductive bars, the bars of each bank beingparallel to each other and the bars of one of said banks being atright-angles to the bars of the other bank, respective circuits eachincluding a respective one of the bars of said one bank, a respectiveindicator in each said circuit, a respective normally-closed switch ineach said circuit, a respective movable member adapted to be operated bya user of the apparatus to operate a said normally-closed switch to itsopen condition, two selector mechanisms, each said selector mechanismadapted selectively to connect the bars of a respective one-half of saidother bank in a second circuit, means adapted to drive said selectormechanisms in synchronism to select said bars of said other bank forconnection in said second circuit in timed sequence, an insulating cardto be inserted between said banks, said insulating card provided withholes in predetermined positions where the bars of both said banks crosseach other, the bars of the respective halves of said other bank beingrelatively laterally displaced and adapted to coact with separate seriesof holes in said card, the bars of both said banks being electricallyinterconnected by contact with each other through said holes whereby theselected bar of said other bank will energise the indicator in thecircuit of each bar of said one bank it contacts until the associatedmovable member is actuated to open the associated normally-closed switchto de-energise the said indicator.

6. Apparatus for testing agility and powers of coordination, comprisingtwo planar banks of conductive bars, the bars of each bank beingparallel to each other and the bars of one of said banks being atright-angles to the bars of the other bank, respective circuits eachincluding a respective one of the bars of said one bank, a respectiveindicator in each said circuit, a respective normally-closed switch ineach said circuit, a respective movable member adapted to be operated bya user of the apparatus to operate a said normally-closed switch to itsopen condition, two selector mechanisms, each said selector mechanismadapted selectively to connect the bars of a respective one-half of saidother bank in a second circuit, means adapted to drive said selectormechanisms in synchronism to select said bars of said other bank forconnection in said second circuit in timed sequence, means adapted tovary the synchronous speed of operation of said selector mechanismswhereby to enable the time factor of the timed sequence to be adjusted,an insulating card to be inserted between said banks, said insulatingcard provided with holes in predetermined positions where the bars ofboth said banks cross each other, the bars of the respective halves ofsaid other bank being relatively laterally displaced and adapted tocoact with separate series of holes in said card, bars of both saidbanks being electrically interconnected by contact with each otherthrough said holes whereby the selected bar of said other bank willenergise the indicator in the circuit of each bar of said one bank itcontacts until the associated movable member is actuated to open theassociated normallyclosed switch to de-energise the said indicator.

7. Apparatus for testing agility and powers of coordination, comprisingtwo planar banks of conductive bars, the bars of each bank beingparallel to each other and the bars of one of said banks being atright-angles to the bars of the other bank, respective circuits eachincluding a respective one of the bars of said one bank, a respectiveindicator in each said circuit, a respective normally-closed switch ineach said circuit, a respective movable member adapted to be operated bya user of the apparatus to operate a said normally-closed switch to itsopen condition, two selector mechanisms, each said selector mechanismadapted selectively to connect the bars of a respeceive one-half of saidother bank in a second circuit, means adapted to drive said selectormechanisms in synchronism to select said bars of said other bank forconnection in said second circuit in timed sequence, means adapted tovary the synchronous speed of operation of said selector mechanismswhereby to enable the time factor of the timed sequence to be adjusted,optionallyoperable means for actuating said selector mechanismssimultaneously to their zero positions, an insulating card to beinserted between said banks, said insulating card provided with holes inpredetermined positions where the bars of both said banks cross eachother, the bars of the respective halves of said other bank beingrelatively laterally displaced and adapted to coast with separate seriesof holes in said card, the bars of both said banks being electricallyinterconnected by contact with each other through said holes whereby theselected bar of said other bank will energise the indicator in thecircuit of each bar of said one bank it contacts until the associatedmovable member is actuated to open the associated normally-closed switchto de-energise the said indicator.

Peck -t July 21, 1896 Potter Dec. 3, 1935

